CN111780598A - Heat exchange plate and micro-channel heat exchanger - Google Patents
Heat exchange plate and micro-channel heat exchanger Download PDFInfo
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- CN111780598A CN111780598A CN202010585138.8A CN202010585138A CN111780598A CN 111780598 A CN111780598 A CN 111780598A CN 202010585138 A CN202010585138 A CN 202010585138A CN 111780598 A CN111780598 A CN 111780598A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
- F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of heat exchange and discloses a heat exchange plate and a micro-channel heat exchanger. The heat exchange plate is characterized in that a plate surface of the heat exchange plate is provided with a fluid inlet, a fluid outlet and a plurality of fluid channels, two ends of each fluid channel are respectively communicated with the fluid inlet and the fluid outlet, and the channel lengths of the fluid channels are matched with the channel width so that the resistance of the fluid channels to the fluid flowing in the forward direction is equal. The heat exchange plate provided by the embodiment of the invention has the advantages that the channel lengths and the channel widths of the multiple fluid channels are correspondingly arranged, so that the resistance of the multiple fluid channels to the fluid flowing in the forward direction is equal, the fluid is uniformly distributed to the multiple fluid channels, and the problem of reverse flow caused by local uneven heating due to uneven fluid flow distribution of the conventional micro-channel heat exchanger is solved.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to a heat exchange plate and a micro-channel heat exchanger.
Background
The micro-channel heat exchanger is a heat exchanger with a heat exchange channel equivalent diameter of 10-1000 μm, and is a novel high-efficiency heat exchanger. Compared with the traditional heat exchanger, the micro-channel heat exchanger has the outstanding advantages of large specific surface area, compact equipment and the like. In addition, because the heat exchanger has compact structure, the equipment has good compression resistance and higher reliability, and has wide application prospect in various fields such as refrigeration air conditioners, energy power and the like.
In general, the flow field state in the microchannel heat exchanger is stable, the heat transfer process can be continuously carried out, the channel width of each fluid channel in the existing microchannel heat exchanger is generally equal, the channel lengths of the fluid channels are typically unequal, which results in unequal resistances of the fluid channels to the fluid, therefore, the problem of uneven distribution of fluid flow in each fluid channel of the microchannel heat exchanger is easily caused, local overheating in the channels can be caused due to the uneven distribution of the fluid flow in each fluid channel, the pressure mutation can be caused due to the fact that the fluid in the channels is heated and expanded (or the fluid is subjected to local disturbance to cause phase change in a near-saturation state) due to the local overheating in the channels, and the instantaneous reverse flow phenomenon can be caused in the channels, particularly, the transient reverse flow phenomenon is more likely to occur for the fluid which is easy to be heated unevenly or has phase change. The heat transfer efficiency of the microchannel heat exchanger is significantly affected by the occurrence of the transient countercurrent phenomenon, and particularly, under the condition of low driving force (such as a natural circulation heat exchanger), the heat transfer process can be stopped, and the reliable heat dissipation of a heat source user is affected.
Disclosure of Invention
The embodiment of the invention provides a heat exchange plate and a micro-channel heat exchanger, which are used for solving or partially solving the problem of uneven distribution of fluid flow in each fluid channel of the conventional micro-channel heat exchanger.
The embodiment of the invention provides a heat exchange plate, wherein a plate surface of the heat exchange plate is provided with a fluid inlet, a fluid outlet and a plurality of fluid channels, two ends of each fluid channel are respectively communicated with the fluid inlet and the fluid outlet, and the channel lengths of the fluid channels are matched with the channel width, so that the resistance of the fluid channels to fluid flowing in the forward direction is equal.
Wherein the resistance of the plurality of fluid channels to the counter-flowing fluid is equal; and/or a plurality of said fluid channels having a resistance to fluid flow in a forward direction that is less than a resistance to fluid flow in a reverse direction.
Wherein the inlets of a plurality of said fluid channels are arranged around said fluid inlet; and/or the presence of a gas in the gas,
a plurality of outlets of the fluid channels are arranged around the fluid outlet; and/or the presence of a gas in the gas,
the inlets of the fluid channels are all spaced from the fluid inlet, the distances between the inlets of the fluid channels and the fluid inlet are equal, an inlet fluid distribution groove is formed in the plate surface of the heat exchange plate, where the fluid channel is arranged, the inlet fluid distribution groove is located between the fluid inlet and the inlets of the fluid channels, and the fluid inlet is communicated with the inlets of the fluid channels through the inlet fluid distribution groove; and/or the presence of a gas in the gas,
the outlets of the fluid channels are all spaced from the fluid outlets, the distances between the outlets of the fluid channels and the fluid outlets are equal, an outlet fluid collecting groove is formed in the plate surface of the heat exchange plate, where the fluid channels are arranged, and is located between the fluid outlets and the outlets of the fluid channels, and the fluid outlets are communicated with the outlets of the fluid channels through the outlet fluid collecting groove.
Wherein the fluid inlet is spaced from the fluid outlet in a first direction, the fluid passage including an inlet section adjacent the fluid inlet, an outlet section adjacent the fluid outlet, and a heat exchange section extending in the first direction and communicating the inlet section with the outlet section; the heat exchange sections of the plurality of fluid channels are arranged side by side in a second direction, wherein the first direction intersects the second direction.
Wherein the plurality of fluid passages include a middle fluid passage and a plurality of side fluid passages respectively provided at both sides of the middle fluid passage in the second direction, wherein:
the inlet sections of the side fluid channels are all arranged in an arc-shaped channel, and the bending degree of the inlet sections is larger as the inlet sections are far away from the middle fluid channel; and/or the presence of a gas in the gas,
the outlet sections of the side fluid channels are arc-shaped channels and are far away from the middle fluid channel, and the bending degree is larger.
Wherein the resistance of the heat exchange section to a forward flowing fluid is less than the resistance to a reverse flowing fluid.
The heat exchange section comprises a main pulse channel and a branch pulse channel, the main pulse channel extends along the first direction, the two sides of the main pulse channel in the second direction are both communicated with the branch pulse channel, the inlet of the branch pulse channel is close to the fluid outlet relative to the outlet of the branch pulse channel, the inlet of the branch pulse channel is communicated with the main pulse channel, and the outlet of the branch pulse channel is communicated with the outlet of the adjacent branch pulse channel of the heat exchange section.
Wherein the branch channel is gradually far away from the main channel in the direction from the inlet to the outlet of the branch channel.
The heat exchange plate is provided with a plurality of fluid channels, wherein the periphery of the plurality of fluid channels is provided with a first circulation port and a second circulation port, the fluid inlet, the fluid outlet, the first circulation port and the second circulation port are respectively positioned at four corners of a parallelogram area, the fluid inlet and the fluid outlet are arranged diagonally, and the first circulation port and the second circulation port are arranged diagonally.
The embodiment of the invention also provides a micro-channel heat exchanger which comprises the heat exchange plate.
The heat exchange plate provided by the embodiment of the invention has the advantages that the channel lengths and the channel widths of the multiple fluid channels are correspondingly arranged, so that the resistance of the multiple fluid channels to the fluid flowing in the forward direction is equal, the fluid is uniformly distributed to the multiple fluid channels, and the problem of reverse flow caused by local uneven heating due to uneven fluid flow distribution of the conventional micro-channel heat exchanger is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view of a heat exchange plate according to an embodiment of the present invention;
FIG. 2 is a flow diagram of a forward flow of fluid within the heat exchange section of FIG. 1;
FIG. 3 is a flow diagram of the reverse flow of fluid within the heat exchange section of FIG. 1;
FIG. 4 is a schematic view of a heat exchanger plate of equal width mated with the heat exchanger plate of FIG. 1;
description of reference numerals: heat exchange plate 100, fluid inlet 1, fluid outlet 2, fluid channel 3, inlet section 31, outlet section 32, heat exchange section 33, main channel 331, branch channel 332, inlet fluid distribution groove 4, outlet fluid collection groove 5, first communication port 6, second communication port 7, uniform width heat exchange plate 200, channel inlet 210, channel outlet 220, heat exchange channel 230, first communication port 240, second communication port 250.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An embodiment of the present invention provides a heat exchange plate, which can be applied to a microchannel heat exchanger, as shown in fig. 1, a plate surface of the heat exchange plate 100 is provided with a fluid inlet 1, a fluid outlet 2 and a plurality of fluid channels 3. The fluid channel 3 does not penetrate through the heat exchange plate 100, and the fluid channel 3 may be processed on the heat exchange plate 100 (the material of the heat exchange plate 100 is usually metal) by using methods such as laser and chemical etching; while the fluid inlet 1 and the fluid outlet 2 are penetrating the heat exchange plate 100, the fluid inlet 1 and the fluid outlet 2 may be formed on the heat exchange plate 100 by etching or punching. The plate surface of the heat exchange plate 100 provided with the fluid channel 3 is used as the front surface of the heat exchange plate 100, the plate surface of the heat exchange plate 100 opposite to the front surface is used as the back surface of the heat exchange plate 100, when a plurality of heat exchange plates 100 are stacked, the front surface of one of any two adjacent heat exchange plates 100 is attached to the back surface of the other heat exchange plate, so that the fluid channels 3 on the front surface of the one are covered through the back surface of the other heat exchange plate.
The two ends of each fluid channel 3 are respectively communicated with the fluid inlet 1 and the fluid outlet 2, and the channel length and the channel width of the plurality of fluid channels 3 are matched so that the resistance of the plurality of fluid channels 3 to the fluid flowing in the forward direction is equal. Wherein the forward direction is a direction from the inlet of the fluid channel 3 to the outlet of the fluid channel 3, and the reverse direction is a direction from the outlet of the fluid channel 3 to the inlet of the fluid channel 3. Whereas the channel length of the fluid channel 3 refers to the dimension of the fluid channel 3 in the extending direction of the fluid channel 3, the channel width of the fluid channel 3 refers to the dimension of the fluid channel 3 in the direction perpendicular to the extending direction of the fluid channel 3. The resistance of the fluid channel 3 to the fluid is related to the channel length, the channel width and other factors of the fluid channel 3, and under the condition that the channel width of the fluid channel 3 is determined, the longer the channel length of the fluid channel 3 is, the greater the resistance of the fluid channel 3 to the fluid is, the shorter the channel length of the fluid channel 3 is, and the smaller the resistance of the fluid channel 3 to the fluid is; in the case where the channel length of the fluid channel 3 is determined, the narrower the channel width of the fluid channel 3, the greater the resistance of the fluid channel 3 to the fluid, and the wider the channel width of the fluid channel 3, the smaller the resistance of the fluid channel 3 to the fluid. The channel lengths and channel widths of the plurality of fluid channels 3 may be adapted by using one of the plurality of fluid channels 3 as a reference fluid channel 3, and adjusting the channel lengths and/or channel widths of the other fluid channels 3 to equalize the resistances of the plurality of fluid channels 3 to the fluid flowing in the forward direction, for example, when the channel length of any one of the other fluid channels 3 is longer than the channel length of the reference fluid channel 3, the channel width of the any one fluid channel 3 may be widened relative to the channel width of the reference fluid channel 3; when the channel length of any one of the other fluid channels 3 is shorter than the channel length of the reference fluid channel 3, the channel width of the any one fluid channel 3 may be reduced with respect to the channel width of the reference fluid channel 3. Since the resistance of the plurality of fluid channels 3 to the fluid flowing in the forward direction is equal, the fluid entering from the fluid inlet 1 can be distributed to the plurality of fluid channels 3 more uniformly when the fluid flows from the fluid inlet 1 to the fluid outlet 2.
In order to distribute the fluid entering from the fluid inlet 1 to the plurality of fluid channels 3 more uniformly, the inlets of the plurality of fluid channels 3 may be defined to be spaced equally from the fluid inlet 1, so that the distance from the edge of the fluid inlet 1 to the inlet of each fluid channel 3 is equal, which is beneficial to distribute the fluid entering from the fluid inlet 1 to the plurality of fluid channels 3 uniformly. The inlets of the fluid channels 3 are equally spaced from the fluid inlet 1, and may be spaced from each other by zero, that is, the inlets of the fluid channels 3 are directly communicated with the fluid inlet 1; as shown in fig. 1, in the present embodiment, inlets of the plurality of fluid channels 3 are spaced from the fluid inlet 1, and the distances between the inlets of the plurality of fluid channels 3 and the fluid inlet 1 are equal, an inlet fluid distribution groove 4 is formed in the plate surface of the heat exchange plate 100 on which the fluid channels 3 are disposed, the inlet fluid distribution groove 4 is located between the fluid inlet 1 and the inlets of the plurality of fluid channels 3, and the fluid inlet 1 communicates with the inlets of the plurality of fluid channels 3 through the inlet fluid distribution groove 4. By arranging the inlet fluid distribution groove 4, not only can the flow resistance near the fluid inlet 1 be reduced, but also the uneven distribution of the fluid of each fluid channel 3 caused by the macroscopic-scale vortex generated near the fluid inlet 1 can be avoided.
As shown in fig. 1, in the present embodiment, the inlets of the plurality of fluid channels 3 are arranged around the fluid inlet 1, and by defining the arrangement of the inlets of the plurality of fluid channels 3, it is not only beneficial to control the distance between the inlets of the plurality of fluid channels 3 and the fluid inlet 1, but also beneficial to arrange the plurality of fluid channels 3 on the heat exchange plate 100 more compactly, and increase the area ratio of the plurality of fluid channels 3 on the heat exchange plate 100.
The heat exchange plate 100 provided by the embodiment of the present invention has the channel lengths and the channel widths of the plurality of fluid channels 3 correspondingly, so that the resistances of the plurality of fluid channels 3 to the fluid flowing in the forward direction are equal, which is beneficial to uniformly distributing the fluid to the plurality of fluid channels 3, thereby improving the problem of the existing microchannel heat exchanger that the counter flow is caused by the local uneven heating due to the uneven distribution of the fluid flow.
As described above, the resistance of the plurality of fluid channels 3 to fluid flowing in the forward direction is equal, while the resistance of the plurality of fluid channels 3 to fluid flowing in the reverse direction may or may not be equal. The magnitude relationship between the resistance of the plurality of fluid passages 3 to the fluid flowing in the forward direction and the resistance to the fluid flowing in the reverse direction may be defined such that the resistance of the plurality of fluid passages 3 to the fluid flowing in the forward direction is equal to the resistance to the fluid flowing in the reverse direction; the specific arrangement mode that the resistance of the plurality of fluid channels 3 to the fluid flowing in the forward direction is smaller than the resistance to the fluid flowing in the reverse direction, the fluid channels 3 can generate differential resistance in the forward and reverse flowing processes, and the reverse flow resistance is much larger than the forward flow resistance, so that the fluid is effectively prevented from forming reverse flow, and when the heat exchange plate 100 is applied to a heat exchanger, the operation stability and reliability of the heat exchanger can be improved, wherein the specific arrangement mode that the resistance of the plurality of fluid channels 3 to the fluid flowing in the forward direction is smaller than the resistance to the fluid flowing in the reverse direction will be described in detail below.
The fluid can exchange heat in the plurality of fluid passages 3, and the specific shape of the fluid passages 3 is not particularly limited, for example, the fluid passages 3 may be linear passages extending along a straight line; the fluid channel 3 may be an arc-shaped channel extending along an arc; the fluid channel 3 may also be a wavy channel extending along a wavy line, or the like. Specifically, as shown in fig. 1, in the present embodiment, the fluid inlet 1 is spaced from the fluid outlet 2 in a first direction, and the fluid channel 3 includes an inlet section 31 adjacent to the fluid inlet 1, an outlet section 32 adjacent to the fluid outlet 2, and a heat exchange section 33 extending in the first direction and communicating the inlet section 31 and the outlet section 32; the heat exchange sections 33 of the plurality of fluid channels 3 are arranged side by side in the second direction, so that the area ratio of the plurality of fluid channels 3 on the heat exchange plate 100 is increased by defining the position relationship between the fluid inlet 1 and the fluid outlet 2 and the shape of the fluid channels 3, thereby improving the heat transfer efficiency of the heat exchange plate 100. The first direction intersects the second direction, for example, in the present embodiment, the first direction is perpendicular to or approximately perpendicular to the second direction.
Further, as shown in fig. 1, in the present embodiment, the plurality of fluid passages 3 includes a middle fluid passage, and a plurality of side fluid passages provided on both sides of the middle fluid passage in the second direction, wherein: the inlet sections 31 of the more or less lateral fluid channels are arranged in an arc-shaped channel and are bent to a greater extent the further away from the central fluid channel. The inlet section 31 is provided as an arcuate channel, and the fluid can be uniformly guided into each fluid channel 3 by the coanda effect of the inner side wall of the arcuate channel on the fluid.
Also, as shown in FIG. 1, in the present embodiment, the outlet sections 32 of the more or less lateral fluid passages are arranged in an arc-shaped passage and are bent more and more away from the central fluid passage. The outlet section 32 is provided as an arcuate channel, and the fluid can be uniformly guided to the fluid outlet 2 by the coanda effect of the inner side wall of the arcuate channel on the fluid.
As described above, the resistance of the plurality of fluid passages 3 to the fluid flowing in the forward direction is smaller than the resistance to the fluid flowing in the reverse direction, and it is possible to arrange the entire fluid passages 3 to have the resistance to the fluid flowing in the forward direction smaller than the resistance to the fluid flowing in the reverse direction, wherein the entire fluid passages 3 include the inlet section 31, the outlet section 32 and the heat exchange section 33; it is also possible to arrange the parts of the fluid channel 3 to have a lower resistance to a forward flowing fluid than to a reverse flowing fluid, e.g. to arrange the inlet section 31 and/or the outlet section 32 to have a lower resistance to a forward flowing fluid than to a reverse flowing fluid. In particular, in this embodiment, the heat exchange section 33 has less resistance to forward flow than to reverse flow. The heat exchange section 33 can generate differential resistance in the forward and reverse flow processes, and the reverse flow resistance is far greater than the forward flow resistance, so that the reverse flow resistance can effectively prevent the fluid from forming a reverse flow, and the stability and reliability of the heat exchanger can be improved when the heat exchange plate 100 is applied to the heat exchanger.
Further, as shown in fig. 1 to 3, the heat exchange section 33 includes a main channel 331 and a branch channel 332, the main channel 331 extends along the first direction, both sides of the main channel 331 in the second direction are both provided with the branch channel 332 in a communication manner, an inlet of the branch channel 332 is disposed close to the fluid outlet 2 relative to an outlet of the branch channel 332, an inlet of the branch channel 332 is communicated with the main channel 331, and an outlet of the branch channel 332 is communicated with an outlet of the branch channel 332 of the adjacent heat exchange section 33. For example, as shown in fig. 2, the branch channel 332 is disposed gradually away from the main channel 331 in a direction from an inlet to an outlet of the branch channel 332, that is, the branch channel 332 is a linear channel disposed obliquely with respect to the main channel 331. As shown in fig. 2, each heat exchange segment 33 is formed by connecting Y-shaped channels in series along a first direction, when the fluid flows in the forward direction, the fluid in the main channel 331 does not enter the branch channel 332, the flow line is smooth, the flow is smooth, and the channel resistance is small; as shown in FIG. 3, when the fluid flows in the reverse direction, the fluid in the main channel 331 enters the branch channel 332, and a series of vortex pairs are formed at the branch end of the Y-shaped channel (i.e. the branch channel 332), so as to generate a large flow resistance, thereby effectively preventing the fluid from forming the reverse flow.
The fluid flowing out from the outlets of the plurality of fluid channels 3 finally flows out from the fluid outlet 2, and in order to make the fluid flow out from the fluid outlet 2 uniformly, the outlets of the plurality of fluid channels 3 and the fluid outlet 2 may be defined to be equally spaced, so that the distance from the edge of the fluid outlet 2 to the outlet of each fluid channel 3 is equal, which is beneficial to make the fluid flow out from the fluid outlet 2 uniformly. The outlets of the fluid channels 3 are equally spaced from the fluid outlet 2, or the distances between the outlets of the fluid channels 3 and the fluid outlet 2 may be zero, that is, the outlets of the fluid channels 3 are directly communicated with the fluid outlet 2; as shown in fig. 1, in this embodiment, outlets of the plurality of fluid passages 3 are all spaced from the fluid outlet 2, and the distances between the outlets of the plurality of fluid passages 3 and the fluid outlet 2 are equal, an outlet fluid collecting groove 5 is formed on the plate surface of the heat exchange plate 100 where the fluid passages 3 are disposed, the outlet fluid collecting groove 5 is located between the fluid outlet 2 and the outlets of the plurality of fluid passages 3, and the fluid outlet 2 communicates with the outlets of the plurality of fluid passages 3 through the outlet fluid collecting groove 5. The outlet fluid collecting groove 5 is arranged to facilitate the fluid flowing out from the outlets of the plurality of fluid channels 3 to be collected to the fluid outlet 2 and to uniformly flow out from the fluid outlet 2.
As shown in fig. 1, in the present embodiment, the outlets of the plurality of fluid channels 3 are arranged around the fluid outlet 2, and the arrangement of the outlets of the plurality of fluid channels 3 is beneficial to not only control the distance between the outlets of the plurality of fluid channels 3 and the fluid outlet 2, but also compactly arrange the plurality of fluid channels 3 on the heat exchange plate 100, thereby increasing the area ratio of the plurality of fluid channels 3 on the heat exchange plate 100.
Embodiments of the present invention also provide a microchannel heat exchanger, which includes a plurality of heat exchange plates 100 as described above.
Specifically, a plurality of heat exchange plates 100 may be stacked for use, as shown in fig. 1, a first circulation port 6 and a second circulation port 7 are provided on the heat exchange plates 100 and located on the periphery of the plurality of fluid channels 3, the fluid inlet 1, the fluid outlet 2, the first circulation port 6, and the second circulation port 7 are located at four corners of a parallelogram region, the fluid inlet 1 and the fluid outlet 2 are diagonally arranged, and the first circulation port 6 and the second circulation port 7 are diagonally arranged. When stacking a plurality of heat exchange plates 100, the front orientation of a plurality of heat exchange plates 100 is the same, a plurality of heat exchange plates 100 comprise a plurality of cold fluid heat exchange plates and a plurality of hot fluid heat exchange plates, a hot fluid heat exchange plate is arranged between any two adjacent cold fluid heat exchange plates, a fluid inlet 1 of the hot fluid heat exchange plate is communicated with a first fluid port 6 of the cold fluid heat exchange plate, a fluid outlet 2 of the hot fluid heat exchange plate is communicated with a second fluid port 7 of the cold fluid heat exchange plate, a fluid inlet 1 of the cold fluid heat exchange plate is communicated with the first fluid port 6 of the hot fluid heat exchange plate, and a fluid outlet 2 of the cold fluid heat exchange plate is communicated with the second fluid port 7 of the hot fluid heat exchange plate.
The heat exchange plate 100 and the heat exchange plate 200 with the same width as shown in fig. 4 may be used in combination, where the heat exchange plate 100 is used to circulate a first fluid, and the heat exchange plate 200 with the same width is used to circulate a second fluid, where the first fluid is a fluid that is likely to be heated unevenly or changed in phase, and the second fluid is a fluid that is not likely to be heated unevenly or changed in phase. The front surface of the heat exchange plate 200 with the same width is provided with a channel inlet 210, a channel outlet 220, a first communicating port 240, a second communicating port 250 and a plurality of parallel heat exchange channels 230, the channel inlet 210 is communicated with the channel outlet 220 through the plurality of heat exchange channels 230, the channel widths of the plurality of heat exchange channels 230 are equal, the channel inlet 210, the channel outlet 220, the first communicating port 240 and the second communicating port 250 are respectively located at four corners of a parallelogram area, the channel inlet 210 and the channel outlet 220 are diagonally arranged, and the first communicating port 240 and the second communicating port 250 are diagonally arranged. When a plurality of heat exchange plates 100 and a plurality of heat exchange plates 200 with the same width are stacked, the front orientations of the heat exchange plates 100 and the heat exchange plates 200 with the same width are the same, one heat exchange plate 100 is arranged between any two adjacent heat exchange plates 200 with the same width, a fluid inlet 1 of the heat exchange plate 100 is communicated with a first communication port 240 of the heat exchange plate 200 with the same width, a fluid outlet 2 of the heat exchange plate 100 is communicated with a second communication port 250 of the heat exchange plate 200 with the same width, a channel inlet 210 of the heat exchange plate 200 with the same width is communicated with a first communication port 6 of the heat exchange plate 100, and a channel outlet 220 of the heat exchange plate 200 with the second communication port 7 of the heat exchange plate 100 with the same width.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A heat exchange plate is characterized in that a plate surface of the heat exchange plate is provided with a fluid inlet, a fluid outlet and a plurality of fluid channels, two ends of each fluid channel are respectively communicated with the fluid inlet and the fluid outlet, and the channel lengths and the channel widths of the fluid channels are matched so that the resistance of the fluid channels to fluid flowing in the forward direction is equal.
2. A heat exchanger plate according to claim 1, wherein a plurality of said fluid channels are equally resistant to counter-flowing fluid; and/or a plurality of said fluid channels having a resistance to fluid flow in a forward direction that is less than a resistance to fluid flow in a reverse direction.
3. A heat exchanger plate according to claim 1, wherein the inlets of a plurality of said fluid channels are arranged around said fluid inlet; and/or the presence of a gas in the gas,
a plurality of outlets of the fluid channels are arranged around the fluid outlet; and/or the presence of a gas in the gas,
the inlets of the fluid channels are all spaced from the fluid inlet, the distances between the inlets of the fluid channels and the fluid inlet are equal, an inlet fluid distribution groove is formed in the plate surface of the heat exchange plate, where the fluid channel is arranged, the inlet fluid distribution groove is located between the fluid inlet and the inlets of the fluid channels, and the fluid inlet is communicated with the inlets of the fluid channels through the inlet fluid distribution groove; and/or the presence of a gas in the gas,
the outlets of the fluid channels are all spaced from the fluid outlets, the distances between the outlets of the fluid channels and the fluid outlets are equal, an outlet fluid collecting groove is formed in the plate surface of the heat exchange plate, where the fluid channels are arranged, and is located between the fluid outlets and the outlets of the fluid channels, and the fluid outlets are communicated with the outlets of the fluid channels through the outlet fluid collecting groove.
4. A heat exchanger plate according to claim 1, wherein the fluid inlet is spaced from the fluid outlet in a first direction, the fluid channel comprising an inlet section adjacent the fluid inlet, an outlet section adjacent the fluid outlet, and a heat exchanger section extending in the first direction and communicating the inlet section with the outlet section; the heat exchange sections of the plurality of fluid channels are arranged side by side in a second direction, wherein the first direction intersects the second direction.
5. A heat exchanger plate according to claim 4, wherein the plurality of fluid channels comprises a central fluid channel and a plurality of side fluid channels provided on either side of the central fluid channel in the second direction, wherein:
the inlet sections of the side fluid channels are all arranged in an arc-shaped channel, and the bending degree of the inlet sections is larger as the inlet sections are far away from the middle fluid channel; and/or the presence of a gas in the gas,
the outlet sections of the side fluid channels are arc-shaped channels and are far away from the middle fluid channel, and the bending degree is larger.
6. A heat exchange panel according to claim 4, wherein the heat exchange section has a lower resistance to forward flow of fluid than to reverse flow of fluid.
7. A heat exchange plate according to claim 6, wherein the heat exchange section comprises a main channel and a branch channel, the main channel extends along the first direction, the branch channel is arranged on both sides of the main channel in the second direction in a communicating manner, an inlet of the branch channel is arranged close to the fluid outlet relative to an outlet of the branch channel, an inlet of the branch channel is communicated with the main channel, and an outlet of the branch channel is communicated with an outlet of the branch channel of the adjacent heat exchange section.
8. A heat exchanger plate according to claim 7, wherein the branched veins are located progressively further away from the main vein in a direction from the inlet to the outlet of the branched veins.
9. A heat exchanger plate according to claim 1, wherein a first fluid port and a second fluid port are formed on the heat exchanger plate at the periphery of the plurality of fluid passages, the fluid inlet, the fluid outlet, the first fluid port and the second fluid port are respectively located at four corners of a parallelogram area, the fluid inlet and the fluid outlet are diagonally arranged, and the first fluid port and the second fluid port are diagonally arranged.
10. A microchannel heat exchanger comprising a heat exchanger plate according to any one of claims 1 to 9.
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| CN202010585138.8A CN111780598B (en) | 2020-06-23 | 2020-06-23 | Heat exchange plate and micro-channel heat exchanger |
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| CN202010585138.8A CN111780598B (en) | 2020-06-23 | 2020-06-23 | Heat exchange plate and micro-channel heat exchanger |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111780598B (en) | 2021-11-09 |
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